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OK, on the count of three, clap your hands once.
1...2...3!
Did you hear that clap? Chances are good that you did. But how?
You heard it because your ears picked up the sound. The outer ears, the parts that stick out of the sides of your head, collect sound waves and funnel them into the ear canals.
From there, the sound waves are changed into electrical signals that travel to the brain. The brain then interprets those signals and identifies the sound. And it all happens instantaneously.
Bang! Boom! Ouch!
When you clapped your hands, sound waves from the clap vibrated your eardrum. The louder a sound is, the stronger are the vibrations. A sound that's too loud can damage the delicate membrane of the eardrum and cause permanent injury.
Source: HighBeam Research, Hear ye. Hear ye. (Personal care).(ear care)(Brief Article)